DC
Collects stories from Justice League of America #21-22, 29-30, 37–38, 46–47
Crisis on Earth-One!; Crisis on Earth-Two!; Crisis on Earth-Three!; The Most Dangerous Earth of All!; Earth Without a Justice League!; Crisis on Earth-A!; Crisis Between Earth-One and Earth-Two!; The Bridge Between Earths!
Writers: Gardner Fox, Dennis O’Neil
Artist: Mike Sekowsky